Finding the Fourth Proportional to 10,213.04, 15,389.03 and 8,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,213.04 : 15,389.03 = 8,404.72 : x
2. Step 2: Convert to fraction form
   10,213.04/15,389.03 = 8,404.72/x
3. Step 3: Cross multiply
   10,213.04x = 15,389.03 × 8,404.72
4. Step 4: Simplify right side
   10,213.04x = 129,340,488.22
5. Step 5: Solve for x
   x = 129,340,488.22/10,213.04
6. Step 6: Final answer
   x = 12,664.25